1)Muff is a Czech experimental jazz band (http://www.muffmusic.com/) 2) Muff is a NuPunk/Punk'n'Roll band from Hannover, Germany. The band are Sunny (Vocals), Anja (Vocals), Zotte (Guitar), Roman (Bass) and Jan (Drums).
They themselves describe their style as punked sex-appeal and a big portion of energy, style and self-esteem.
http://muff-band.de/

3) Muff is a norwegian rock band with four young men playing classic rock with norwegian lyrics. They are from Drammen. The members of the band are Patrice Guillot, Sigurd Hverven, Erik Høydal and Klaus Hagby.

Read more about Muff on Last.fm.